Home / 1,875.40-2,813.70-1,259.80

Finding the Fourth Proportional to 1,875.40, 2,813.70 and 1,259.80

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Solution

The fourth proportional to 1,875.40, 2,813.70 and 1,259.80 is: 1,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.40 : 2,813.70 = 1,259.80 : x
  2. Step 2: Convert to fraction form
    1,875.40/2,813.70 = 1,259.80/x
  3. Step 3: Cross multiply
    1,875.40x = 2,813.70 × 1,259.80
  4. Step 4: Simplify right side
    1,875.40x = 3,544,699.26
  5. Step 5: Solve for x
    x = 3,544,699.26/1,875.40
  6. Step 6: Final answer
    x = 1,890.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.